def main(args):
    if len(args) <= 4:
        raise Exception('Expected at least 5 arguments.')
    component_dir = args[1]
    input_file_name = args[2]
    in_out_break_index = args.index('--')
    output_file_names = args[in_out_break_index + 1:]

    idl_file_names = read_idl_files_list_from_file(input_file_name)
    components = set([idl_filename_to_component(filename)
                      for filename in idl_file_names])
    if len(components) != 1:
        raise Exception('Cannot aggregate generated codes in different components')
    aggregate_partial_interfaces = component_dir not in components

    files_meta_data = extract_meta_data(idl_file_names)
    total_partitions = len(output_file_names)
    for partition, file_name in enumerate(output_file_names):
        files_meta_data_this_partition = [
                meta_data for meta_data in files_meta_data
                if hash(meta_data['name']) % total_partitions == partition]
        file_contents = generate_content(component_dir,
                                         aggregate_partial_interfaces,
                                         files_meta_data_this_partition)
        write_content(file_contents, file_name)

        def collect_unforgeable_attributes(definition, idl_filename):
            """Collects [Unforgeable] attributes so that we can define them on
            sub-interfaces later.  The resulting structure is as follows.
                interfaces_info[interface_name] = {
                    'unforgeable_attributes': {
                        'core': [IdlAttribute, ...],
                        'modules': [IdlAttribute, ...],
                    },
                    ...
                }
            """
            interface_info = {}
            unforgeable_attributes = get_unforgeable_attributes_from_definition(definition)
            if not unforgeable_attributes:
                return interface_info

            if definition.is_partial:
                interface_basename = idl_filename_to_interface_name(idl_filename)
                # TODO(yukishiino): [PartialInterfaceImplementedAs] is treated
                # in interface_dependency_resolver.transfer_extended_attributes.
                # Come up with a better way to keep them consistent.
                for attr in unforgeable_attributes:
                    attr.extended_attributes['PartialInterfaceImplementedAs'] = definition.extended_attributes.get('ImplementedAs', interface_basename)
            component = idl_filename_to_component(idl_filename)
            interface_info['unforgeable_attributes'] = {}
            interface_info['unforgeable_attributes'][component] = unforgeable_attributes
            return interface_info

def compute_global_type_info():
    ancestors = {}
    dictionaries = {}
    component_dirs = {}
    implemented_as_interfaces = {}
    garbage_collected_interfaces = set()
    callback_interfaces = set()

    for interface_name, interface_info in interfaces_info.iteritems():
        component_dirs[interface_name] = idl_filename_to_component(interface_info["full_path"])

        if interface_info["ancestors"]:
            ancestors[interface_name] = interface_info["ancestors"]
        if interface_info["is_callback_interface"]:
            callback_interfaces.add(interface_name)
        if interface_info["is_dictionary"]:
            dictionaries[interface_name] = interface_info["is_dictionary"]
        if interface_info["implemented_as"]:
            implemented_as_interfaces[interface_name] = interface_info["implemented_as"]

        inherited_extended_attributes = interface_info["inherited_extended_attributes"]
        garbage_collected_interfaces.add(interface_name)

    interfaces_info["ancestors"] = ancestors
    interfaces_info["callback_interfaces"] = callback_interfaces
    interfaces_info["dictionaries"] = dictionaries
    interfaces_info["implemented_as_interfaces"] = implemented_as_interfaces
    interfaces_info["garbage_collected_interfaces"] = garbage_collected_interfaces
    interfaces_info["component_dirs"] = component_dirs

def compute_global_type_info():
    ancestors = {}
    dictionaries = {}
    component_dirs = {}
    implemented_as_interfaces = {}
    will_be_garbage_collected_interfaces = set()
    garbage_collected_interfaces = set()
    callback_interfaces = set()

    for interface_name, interface_info in interfaces_info.iteritems():
        component_dirs[interface_name] = idl_filename_to_component(interface_info['full_path'])

        if interface_info['ancestors']:
            ancestors[interface_name] = interface_info['ancestors']
        if interface_info['is_callback_interface']:
            callback_interfaces.add(interface_name)
        if interface_info['is_dictionary']:
            dictionaries[interface_name] = interface_info['is_dictionary']
        if interface_info['implemented_as']:
            implemented_as_interfaces[interface_name] = interface_info['implemented_as']

        inherited_extended_attributes = interface_info['inherited_extended_attributes']
        if 'WillBeGarbageCollected' in inherited_extended_attributes:
            will_be_garbage_collected_interfaces.add(interface_name)
        if 'GarbageCollected' in inherited_extended_attributes:
            garbage_collected_interfaces.add(interface_name)

    interfaces_info['ancestors'] = ancestors
    interfaces_info['callback_interfaces'] = callback_interfaces
    interfaces_info['dictionaries'] = dictionaries
    interfaces_info['implemented_as_interfaces'] = implemented_as_interfaces
    interfaces_info['garbage_collected_interfaces'] = garbage_collected_interfaces
    interfaces_info['will_be_garbage_collected_interfaces'] = will_be_garbage_collected_interfaces
    interfaces_info['component_dirs'] = component_dirs

 def compile_and_write(self, idl_filename):
     interface_name = idl_filename_to_interface_name(idl_filename)
     component = idl_filename_to_component(idl_filename)
     definitions = self.reader.read_idl_definitions(idl_filename)
     output_code_list = self.code_generator.generate_code(
         definitions[component], interface_name)
     for output_path, output_code in output_code_list:
         write_file(output_code, output_path, self.only_if_changed)

    def generate_interface_code(self, definitions, interface_name, interface):
        interface_info = self.info_provider.interfaces_info[interface_name]
        full_path = interface_info.get('full_path')
        component = idl_filename_to_component(full_path)
        include_paths = interface_info.get('dependencies_include_paths')

        # Select appropriate Jinja template and contents function
        #
        # A callback interface with constants needs a special handling.
        # https://heycam.github.io/webidl/#legacy-callback-interface-object
        if interface.is_callback and len(interface.constants) > 0:
            header_template_filename = 'legacy_callback_interface.h.tmpl'
            cpp_template_filename = 'legacy_callback_interface.cpp.tmpl'
            interface_context = v8_callback_interface.legacy_callback_interface_context
        elif interface.is_callback:
            header_template_filename = 'callback_interface.h.tmpl'
            cpp_template_filename = 'callback_interface.cpp.tmpl'
            interface_context = v8_callback_interface.callback_interface_context
        elif interface.is_partial:
            interface_context = v8_interface.interface_context
            header_template_filename = 'partial_interface.h.tmpl'
            cpp_template_filename = 'partial_interface.cpp.tmpl'
            interface_name += 'Partial'
            assert component == 'core'
            component = 'modules'
            include_paths = interface_info.get('dependencies_other_component_include_paths')
        else:
            header_template_filename = 'interface.h.tmpl'
            cpp_template_filename = 'interface.cpp.tmpl'
            interface_context = v8_interface.interface_context

        template_context = interface_context(interface, definitions.interfaces)
        includes.update(interface_info.get('cpp_includes', {}).get(component, set()))
        if not interface.is_partial and not is_testing_target(full_path):
            template_context['header_includes'].add(self.info_provider.include_path_for_export)
            template_context['exported'] = self.info_provider.specifier_for_export
        # Add the include for interface itself
        if IdlType(interface_name).is_typed_array:
            template_context['header_includes'].add('core/typed_arrays/DOMTypedArray.h')
        else:
            template_context['header_includes'].add(interface_info['include_path'])
        template_context['header_includes'].update(
            interface_info.get('additional_header_includes', []))
        header_template = self.jinja_env.get_template(header_template_filename)
        cpp_template = self.jinja_env.get_template(cpp_template_filename)
        header_text, cpp_text = self.render_template(
            include_paths, header_template, cpp_template, template_context,
            component)
        header_path, cpp_path = self.output_paths(interface_name)
        return (
            (header_path, header_text),
            (cpp_path, cpp_text),
        )

    def read_idl_definitions(self, idl_filename):
        """Returns a dictionary whose key is component and value is an IdlDefinitions object for an IDL file, including all dependencies."""
        definitions = self.read_idl_file(idl_filename)
        component = idl_filename_to_component(idl_filename)

        if not self.interface_dependency_resolver:
            return {component: definitions}

        # This definitions should have a dictionary. No need to resolve any
        # dependencies.
        if not definitions.interfaces:
            return {component: definitions}

        return self.interface_dependency_resolver.resolve_dependencies(definitions, component)

    def generate_interface_code(self, definitions, interface_name, interface):
        # Store other interfaces for introspection
        interfaces.update(definitions.interfaces)

        interface_info = self.info_provider.interfaces_info[interface_name]
        full_path = interface_info.get('full_path')
        component = idl_filename_to_component(full_path)
        include_paths = interface_info.get('dependencies_include_paths')

        # Select appropriate Jinja template and contents function
        if interface.is_callback:
            header_template_filename = 'callback_interface.h'
            cpp_template_filename = 'callback_interface.cpp'
            interface_context = v8_callback_interface.callback_interface_context
        elif interface.is_partial:
            interface_context = v8_interface.interface_context
            header_template_filename = 'partial_interface.h'
            cpp_template_filename = 'partial_interface.cpp'
            interface_name += 'Partial'
            assert component == 'core'
            component = 'modules'
            include_paths = interface_info.get('dependencies_other_component_include_paths')
        else:
            header_template_filename = 'interface.h'
            cpp_template_filename = 'interface.cpp'
            interface_context = v8_interface.interface_context

        template_context = interface_context(interface)
        includes.update(interface_info.get('cpp_includes', {}).get(component, set()))
        if not interface.is_partial and not is_testing_target(full_path):
            template_context['header_includes'].add(self.info_provider.include_path_for_export)
            template_context['exported'] = self.info_provider.specifier_for_export
        # Add the include for interface itself
        if IdlType(interface_name).is_typed_array:
            template_context['header_includes'].add('core/dom/DOMTypedArray.h')
        elif interface_info['include_path']:
            template_context['header_includes'].add(interface_info['include_path'])
        template_context['header_includes'].update(
            interface_info.get('additional_header_includes', []))
        header_template = self.jinja_env.get_template(header_template_filename)
        cpp_template = self.jinja_env.get_template(cpp_template_filename)
        header_text, cpp_text = render_template(
            include_paths, header_template, cpp_template, template_context,
            component)
        header_path, cpp_path = self.output_paths(interface_name)
        return (
            (header_path, header_text),
            (cpp_path, cpp_text),
        )

def render_template(include_paths, header_template, cpp_template,
                    template_context, component=None):
    template_context['code_generator'] = module_pyname

    # Add includes for any dependencies
    template_context['header_includes'] = sorted(
        template_context['header_includes'])

    for include_path in include_paths:
        if component:
            dependency = idl_filename_to_component(include_path)
            assert is_valid_component_dependency(component, dependency)
        includes.add(include_path)

    template_context['cpp_includes'] = sorted(includes)

    header_text = header_template.render(template_context)
    cpp_text = cpp_template.render(template_context)
    return header_text, cpp_text

    def render_template(self, include_paths, header_template, cpp_template,
                        template_context, component=None):
        template_context['code_generator'] = self.generator_name

        # Add includes for any dependencies
        template_context['header_includes'] = normalize_and_sort_includes(
            template_context['header_includes'])

        for include_path in include_paths:
            if component:
                dependency = idl_filename_to_component(include_path)
                assert is_valid_component_dependency(component, dependency)
            includes.add(include_path)

        template_context['cpp_includes'] = normalize_and_sort_includes(includes)

        header_text = render_template(header_template, template_context)
        cpp_text = render_template(cpp_template, template_context)
        return header_text, cpp_text

    def generate_interface_code(self, definitions, interface_name, interface):
        interface_info = self.info_provider.interfaces_info[interface_name]
        full_path = interface_info.get("full_path")
        component = idl_filename_to_component(full_path)
        include_paths = interface_info.get("dependencies_include_paths")

        # Select appropriate Jinja template and contents function
        if interface.is_callback:
            header_template_filename = "callback_interface.h.tmpl"
            cpp_template_filename = "callback_interface.cpp.tmpl"
            interface_context = v8_callback_interface.callback_interface_context
        elif interface.is_partial:
            interface_context = v8_interface.interface_context
            header_template_filename = "partial_interface.h.tmpl"
            cpp_template_filename = "partial_interface.cpp.tmpl"
            interface_name += "Partial"
            assert component == "core"
            component = "modules"
            include_paths = interface_info.get("dependencies_other_component_include_paths")
        else:
            header_template_filename = "interface.h.tmpl"
            cpp_template_filename = "interface.cpp.tmpl"
            interface_context = v8_interface.interface_context

        template_context = interface_context(interface, definitions.interfaces)
        includes.update(interface_info.get("cpp_includes", {}).get(component, set()))
        if not interface.is_partial and not is_testing_target(full_path):
            template_context["header_includes"].add(self.info_provider.include_path_for_export)
            template_context["exported"] = self.info_provider.specifier_for_export
        # Add the include for interface itself
        if IdlType(interface_name).is_typed_array:
            template_context["header_includes"].add("core/dom/DOMTypedArray.h")
        elif interface_info["include_path"]:
            template_context["header_includes"].add(interface_info["include_path"])
        template_context["header_includes"].update(interface_info.get("additional_header_includes", []))
        header_template = self.jinja_env.get_template(header_template_filename)
        cpp_template = self.jinja_env.get_template(cpp_template_filename)
        header_text, cpp_text = self.render_template(
            include_paths, header_template, cpp_template, template_context, component
        )
        header_path, cpp_path = self.output_paths(interface_name)
        return ((header_path, header_text), (cpp_path, cpp_text))

def merge_interface_dependencies(definitions, component, target_interface, dependency_idl_filenames, reader):
    """Merge dependencies ('partial interface' and 'implements') in dependency_idl_filenames into target_interface.

    Args:
        definitions: IdlDefinitions object, modified in place
        component:
            string, describing where the above definitions are defined,
            'core' or 'modules'. See KNOWN_COMPONENTS in utilities.py
        target_interface: IdlInterface object, modified in place
        dependency_idl_filenames:
            Idl filenames which depend on the above definitions.
        reader: IdlReader object.
    Returns:
        A dictionary whose key is component and value is IdlDefinitions
        object whose dependency is resolved.
    """
    resolved_definitions = {component: definitions}
    # Sort so order consistent, so can compare output from run to run.
    for dependency_idl_filename in sorted(dependency_idl_filenames):
        dependency_definitions = reader.read_idl_file(dependency_idl_filename)
        dependency_component = idl_filename_to_component(dependency_idl_filename)

        dependency_interface = next(dependency_definitions.interfaces.itervalues())
        dependency_interface_basename, _ = os.path.splitext(os.path.basename(dependency_idl_filename))

        transfer_extended_attributes(dependency_interface,
                                     dependency_interface_basename)

        # We need to use different checkdeps here for partial interface and
        # inheritance.
        if dependency_interface.is_partial:
            # Case: dependency_interface is a partial interface of
            # target_interface.
            # So,
            # - A partial interface defined in modules can update
            #   the original interface defined in core.
            # However,
            # - A partial interface defined in core cannot update
            #   the original interface defined in modules.
            if not is_valid_component_dependency(dependency_component, component):
                raise Exception('The partial interface:%s in %s cannot update '
                                'the original interface:%s in %s' % (dependency_interface.name,
                                                                     dependency_component,
                                                                     target_interface.name,
                                                                     component))

            if dependency_component in resolved_definitions:
                # When merging a new partial interfaces, should not overwrite
                # ImpelemntedAs extended attributes in merged partial
                # interface.
                # See also the below "if 'ImplementedAs' not in ... " line's
                # comment.
                dependency_interface.extended_attributes.pop('ImplementedAs', None)
                resolved_definitions[dependency_component].update(dependency_definitions)
                continue

            dependency_interface.extended_attributes.update(target_interface.extended_attributes)
            assert target_interface == definitions.interfaces[dependency_interface.name]
            # A partial interface should use its original interface's
            # ImplementedAs. If the original interface doesn't have,
            # remove ImplementedAs defined in the partial interface.
            # Because partial interface needs the original interface's
            # cpp class to obtain partial interface's cpp class.
            # e.g.. V8WindowPartial.cpp:
            #   DOMWindow* impl = V8Window::toImpl(holder);
            #   RawPtr<...> cppValue(DOMWindowQuota::webkitStorageInfo(impl));
            # TODO(tasak): remove ImplementedAs extended attributes
            # from all partial interfaces. Instead, rename all cpp/header
            # files correctly. ImplementedAs should not be allowed in
            # partial interfaces.
            if 'ImplementedAs' not in target_interface.extended_attributes:
                dependency_interface.extended_attributes.pop('ImplementedAs', None)
            dependency_interface.original_interface = target_interface
            target_interface.partial_interfaces.append(dependency_interface)
            resolved_definitions[dependency_component] = dependency_definitions
        else:
            # Case: target_interface implements dependency_interface.
            # So,
            # - An interface defined in modules can implement some interface
            #   defined in core.
            #   In this case, we need "NoInterfaceObject" extended attribute.
            # However,
            # - An interface defined in core cannot implement any interface
            #   defined in modules.
            if not is_valid_component_dependency(component, dependency_component):
                raise Exception('The interface:%s in %s cannot implement '
                                'the interface:%s in %s.' % (dependency_interface.name,
                                                             dependency_component,
                                                             target_interface.name,
                                                             component))

            if component != dependency_component and 'NoInterfaceObject' not in dependency_interface.extended_attributes:
                raise Exception('The interface:%s in %s cannot implement '
                                'the interface:%s in %s because of '
                                'missing NoInterfaceObject.' % (dependency_interface.name,
                                                                dependency_component,
                                                                target_interface.name,
                                                                component))

            resolved_definitions[component].update(dependency_definitions)  # merges partial interfaces
#.........这里部分代码省略.........

    def collect_info(self, idl_filename):
        """Reads an idl file and collects information which is required by the
        binding code generation."""
        definitions = self.reader.read_idl_file(idl_filename)

        this_union_types = collect_union_types_from_definitions(definitions)
        self.union_types.update(this_union_types)
        self.typedefs.update(definitions.typedefs)
        # Check enum duplication.
        for enum_name in definitions.enumerations.keys():
            for defined_enum in self.enumerations:
                if defined_enum.name == enum_name:
                    raise Exception('Enumeration %s has multiple definitions' % enum_name)
        self.enumerations.update(definitions.enumerations.values())

        if definitions.interfaces:
            definition = next(definitions.interfaces.itervalues())
            interface_info = {
                'is_callback_interface': definition.is_callback,
                'is_dictionary': False,
                # Interfaces that are referenced (used as types) and that we
                # introspect during code generation (beyond interface-level
                # data ([ImplementedAs], is_callback_interface, ancestors, and
                # inherited extended attributes): deep dependencies.
                # These cause rebuilds of referrers, due to the dependency,
                # so these should be minimized; currently only targets of
                # [PutForwards].
                'referenced_interfaces': get_put_forward_interfaces_from_definition(definition),
            }
        elif definitions.dictionaries:
            definition = next(definitions.dictionaries.itervalues())
            interface_info = {
                'is_callback_interface': False,
                'is_dictionary': True,
                'referenced_interfaces': None,
            }
        else:
            return

        extended_attributes = definition.extended_attributes
        implemented_as = extended_attributes.get('ImplementedAs')
        full_path = os.path.realpath(idl_filename)
        this_include_path = None if 'NoImplHeader' in extended_attributes else include_path(idl_filename, implemented_as)
        if definition.is_partial:
            # We don't create interface_info for partial interfaces, but
            # adds paths to another dict.
            partial_include_paths = []
            if this_include_path:
                partial_include_paths.append(this_include_path)
            if this_union_types:
                component = idl_filename_to_component(idl_filename)
                partial_include_paths.append(
                    'bindings/%s/v8/UnionTypes%s.h' % (component, component.capitalize()))
            self.add_paths_to_partials_dict(definition.name, full_path, partial_include_paths)
            return

        # 'implements' statements can be included in either the file for the
        # implement*ing* interface (lhs of 'implements') or implement*ed* interface
        # (rhs of 'implements'). Store both for now, then merge to implement*ing*
        # interface later.
        left_interfaces, right_interfaces = get_implements_from_definitions(
            definitions, definition.name)

        interface_info.update({
            'extended_attributes': extended_attributes,
            'full_path': full_path,
            'has_union_types': bool(this_union_types),
            'implemented_as': implemented_as,
            'implemented_by_interfaces': left_interfaces,
            'implements_interfaces': right_interfaces,
            'include_path': this_include_path,
            # FIXME: temporary private field, while removing old treatement of
            # 'implements': http://crbug.com/360435
            'is_legacy_treat_as_partial_interface': 'LegacyTreatAsPartialInterface' in extended_attributes,
            'parent': definition.parent,
            'relative_dir': relative_dir_posix(idl_filename),
        })
        self.interfaces_info[definition.name] = interface_info

def merge_interface_dependencies(definitions, component, target_interface, dependency_idl_filenames, reader):
    """Merge dependencies ('partial interface' and 'implements') in dependency_idl_filenames into target_interface.

    Args:
        definitions: IdlDefinitions object, modified in place
        component:
            string, describing where the above definitions are defined,
            'core' or 'modules'. See KNOWN_COMPONENTS in utilities.py
        target_interface: IdlInterface object, modified in place
        dependency_idl_filenames:
            Idl filenames which depend on the above definitions.
        reader: IdlReader object.
    Returns:
        A dictionary whose key is component and value is IdlDefinitions
        object whose dependency is resolved.
    """
    resolved_definitions = {component: definitions}
    # Sort so order consistent, so can compare output from run to run.
    for dependency_idl_filename in sorted(dependency_idl_filenames):
        dependency_definitions = reader.read_idl_file(dependency_idl_filename)
        dependency_component = idl_filename_to_component(dependency_idl_filename)

        dependency_interface = next(dependency_definitions.interfaces.itervalues())
        dependency_interface_basename, _ = os.path.splitext(os.path.basename(dependency_idl_filename))

        transfer_extended_attributes(dependency_interface,
                                     dependency_interface_basename)

        # We need to use different checkdeps here for partial interface and
        # inheritance.
        if dependency_interface.is_partial:
            # Case: dependency_interface is a partial interface of
            # target_interface.
            # So,
            # - A partial interface defined in modules can update
            #   the original interface defined in core.
            # However,
            # - A partial interface defined in core cannot update
            #   the original interface defined in modules.
            if not is_valid_component_dependency(dependency_component, component):
                raise Exception('The partial interface:%s in %s cannot update '
                                'the original interface:%s in %s' % (dependency_interface.name,
                                                                     dependency_component,
                                                                     target_interface.name,
                                                                     component))

            if dependency_component in resolved_definitions:
                resolved_definitions[dependency_component].update(dependency_definitions)
                continue

            dependency_interface.extended_attributes.update(target_interface.extended_attributes)
            assert target_interface == definitions.interfaces[dependency_interface.name]
            dependency_interface.original_interface = target_interface
            target_interface.partial_interfaces.append(dependency_interface)
            resolved_definitions[dependency_component] = dependency_definitions
        else:
            # Case: target_interface implements dependency_interface.
            # So,
            # - An interface defined in modules can implement some interface
            #   defined in core.
            #   In this case, we need "NoInterfaceObject" extended attribute.
            # However,
            # - An interface defined in core cannot implement any interface
            #   defined in modules.
            if not is_valid_component_dependency(component, dependency_component):
                raise Exception('The interface:%s in %s cannot implement '
                                'the interface:%s in %s.' % (dependency_interface.name,
                                                             dependency_component,
                                                             target_interface.name,
                                                             component))

            if component != dependency_component and 'NoInterfaceObject' not in dependency_interface.extended_attributes:
                raise Exception('The interface:%s in %s cannot implement '
                                'the interface:%s in %s because of '
                                'missing NoInterfaceObject.' % (dependency_interface.name,
                                                                dependency_component,
                                                                target_interface.name,
                                                                component))

            resolved_definitions[component].update(dependency_definitions)  # merges partial interfaces
            # Implemented interfaces (non-partial dependencies) are also merged
            # into the target interface, so Code Generator can just iterate
            # over one list (and not need to handle 'implements' itself).
            target_interface.merge(dependency_interface)

    return resolved_definitions

    def collect_info(self, idl_filename):
        """Reads an idl file and collects information which is required by the
        binding code generation."""
        def collect_unforgeable_attributes(definition, idl_filename):
            """Collects [Unforgeable] attributes so that we can define them on
            sub-interfaces later.  The resulting structure is as follows.
                interfaces_info[interface_name] = {
                    'unforgeable_attributes': {
                        'core': [IdlAttribute, ...],
                        'modules': [IdlAttribute, ...],
                    },
                    ...
                }
            """
            interface_info = {}
            unforgeable_attributes = get_unforgeable_attributes_from_definition(definition)
            if not unforgeable_attributes:
                return interface_info

            if definition.is_partial:
                interface_basename = idl_filename_to_interface_name(idl_filename)
                # TODO(yukishiino): [PartialInterfaceImplementedAs] is treated
                # in interface_dependency_resolver.transfer_extended_attributes.
                # Come up with a better way to keep them consistent.
                for attr in unforgeable_attributes:
                    attr.extended_attributes['PartialInterfaceImplementedAs'] = definition.extended_attributes.get('ImplementedAs', interface_basename)
            component = idl_filename_to_component(idl_filename)
            interface_info['unforgeable_attributes'] = {}
            interface_info['unforgeable_attributes'][component] = unforgeable_attributes
            return interface_info

        definitions = self.reader.read_idl_file(idl_filename)

        this_union_types = collect_union_types_from_definitions(definitions)
        self.union_types.update(this_union_types)
        self.typedefs.update(definitions.typedefs)
        # Check enum duplication.
        for enum_name in definitions.enumerations.keys():
            for defined_enum in self.enumerations:
                if defined_enum.name == enum_name:
                    raise Exception('Enumeration %s has multiple definitions' % enum_name)
        self.enumerations.update(definitions.enumerations.values())

        if definitions.interfaces:
            definition = next(definitions.interfaces.itervalues())
            interface_info = {
                'is_callback_interface': definition.is_callback,
                'is_dictionary': False,
                # Interfaces that are referenced (used as types) and that we
                # introspect during code generation (beyond interface-level
                # data ([ImplementedAs], is_callback_interface, ancestors, and
                # inherited extended attributes): deep dependencies.
                # These cause rebuilds of referrers, due to the dependency,
                # so these should be minimized; currently only targets of
                # [PutForwards].
                'referenced_interfaces': get_put_forward_interfaces_from_definition(definition),
            }
        elif definitions.dictionaries:
            definition = next(definitions.dictionaries.itervalues())
            interface_info = {
                'is_callback_interface': False,
                'is_dictionary': True,
                'referenced_interfaces': None,
            }
        else:
            return

        if definition.name not in self.interfaces_info:
            self.interfaces_info[definition.name] = {}

        # Remember [Unforgeable] attributes.
        if definitions.interfaces:
            merge_dict_recursively(self.interfaces_info[definition.name],
                                   collect_unforgeable_attributes(definition, idl_filename))

        component = idl_filename_to_component(idl_filename)
        extended_attributes = definition.extended_attributes
        implemented_as = extended_attributes.get('ImplementedAs')
        full_path = os.path.realpath(idl_filename)
        this_include_path = None if 'NoImplHeader' in extended_attributes else include_path(idl_filename, implemented_as)
        if definition.is_partial:
            # We don't create interface_info for partial interfaces, but
            # adds paths to another dict.
            partial_include_paths = []
            if this_include_path:
                partial_include_paths.append(this_include_path)
            if this_union_types:
                partial_include_paths.append(
                    'bindings/%s/v8/UnionTypes%s.h' % (component, component.capitalize()))
            self.add_paths_to_partials_dict(definition.name, full_path, partial_include_paths)
            # Collects C++ header paths which should be included from generated
            # .cpp files.  The resulting structure is as follows.
            #   interfaces_info[interface_name] = {
            #       'cpp_includes': {
            #           'core': set(['core/foo/Foo.h', ...]),
            #           'modules': set(['modules/bar/Bar.h', ...]),
            #       },
            #       ...
            #   }
            if this_include_path:
#.........这里部分代码省略.........

def compute_interfaces_info_overall(info_individuals):
    """Compute information about IDL files.

    Information is stored in global interfaces_info.
    """
    for info in info_individuals:
        # No overlap between interface names, so ok to use dict.update
        interfaces_info.update(info['interfaces_info'])
        # Interfaces in one component may have partial interfaces in
        # another component. This is ok (not a layering violation), since
        # partial interfaces are used to *extend* interfaces.
        # We thus need to update or append if already present
        dict_of_dicts_of_lists_update_or_append(
                partial_interface_files, info['partial_interface_files'])

    # Record inheritance information individually
    for interface_name, interface_info in interfaces_info.iteritems():
        extended_attributes = interface_info['extended_attributes']
        inherited_extended_attributes_by_interface[interface_name] = dict(
                (key, value)
                for key, value in extended_attributes.iteritems()
                if key in INHERITED_EXTENDED_ATTRIBUTES)
        parent = interface_info['parent']
        if parent:
            parent_interfaces[interface_name] = parent

    # Once all individual files handled, can compute inheritance information
    # and dependencies

    # Compute inheritance info
    for interface_name in interfaces_info:
        compute_inheritance_info(interface_name)

    # Compute dependencies
    # Move implements info from implement*ed* interface (rhs of 'implements')
    # to implement*ing* interface (lhs of 'implements').
    # Note that moving an 'implements' statement between implementing and
    # implemented files does not change the info (or hence cause a rebuild)!
    for right_interface_name, interface_info in interfaces_info.iteritems():
        for left_interface_name in interface_info['implemented_by_interfaces']:
            interfaces_info[left_interface_name]['implements_interfaces'].append(right_interface_name)
        del interface_info['implemented_by_interfaces']

    # An IDL file's dependencies are partial interface files that extend it,
    # and files for other interfaces that this interfaces implements.
    for interface_name, interface_info in interfaces_info.iteritems():
        partial_interface_paths = partial_interface_files[interface_name]
        partial_interfaces_full_paths = partial_interface_paths['full_paths']
        # Partial interface definitions each need an include, as they are
        # implemented in separate classes from the main interface.
        partial_interfaces_include_paths = partial_interface_paths['include_paths']

        implemented_interfaces = interface_info['implements_interfaces']
        try:
            implemented_interfaces_info = [
                interfaces_info[interface]
                for interface in implemented_interfaces]
        except KeyError as key_name:
            raise IdlInterfaceFileNotFoundError('Could not find the IDL file where the following implemented interface is defined: %s' % key_name)
        implemented_interfaces_full_paths = [
            implemented_interface_info['full_path']
            for implemented_interface_info in implemented_interfaces_info]
        # Implemented interfaces don't need includes, as this is handled in
        # the Blink implementation (they are implemented on |impl| itself,
        # hence header is included in implementing class).
        # However, they are needed for legacy implemented interfaces that
        # are being treated as partial interfaces, until we remove these.
        # http://crbug.com/360435
        implemented_interfaces_include_paths = []
        for implemented_interface_info in implemented_interfaces_info:
            if (implemented_interface_